Yoshi's SNES Memory Map
Memory addresses labeled as [SHADOWED] are just areas of memory
which are supposed to be the same as the Master Area (which is
labeled [*MASTER*]).
Programs that are shadowed can usually be executed there in
the high-speed mode.
Interesting thing is that in LoROM, the Save RAM is 256 KB. However
in HiROM, the Save RAM is 128K. According to our sources, this
is correct.
MODE 20 (LoROM - 32 KB Banks)
RESET, BRK, NMI should point to Bank $00
|
| Title |
Bank Range |
Address Range |
Total Size |
| Game ROM |
$00 to $3F
$80 to $BF
|
$8000 to $FFFF [*MASTER*]
$8000 to $FFFF [SHADOWED]
|
16 Mb
16 Mb
|
| Work RAM |
$00 to $3F
$7E to $7F
$80 to $BF
|
$0000 to $1FFF
$0000 to $FFFF
$0000 to $1FFF
|
512 KB
128 KB
512 KB
|
| Save RAM |
$70 to $7F |
$0000 to $7FFF |
256 KB |
MODE 21 (HiROM - 64 KB Banks)
RESET, BRK, NMI should point to Bank $C0
|
| Title |
Bank Range |
Address Range |
Total Size |
| Game ROM |
$00 to $3F
$80 to $BF
$C0 to $FF
|
$8000 to $FFFF [SHADOWED]
$8000 to $FFFF [SHADOWED]
$0000 to $FFFF [*MASTER*]
|
16 Mb
16 Mb
32 Mb
|
| Work RAM |
$00 to $3F
$7E to $7F
$80 to $BF
|
$0000 to $1FFF
$0000 to $FFFF
$0000 to $1FFF
|
512 KB
128 KB
512 KB
|
| Save RAM |
$30 to $3F |
$6000 to $7FFF |
128 KB |
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